Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a535c988e59f4b6c13616752ffaf58b860ad1a01c9ae02336fb9b5850026074' 
  AND token = '+6Yn4JDoF8B0gTAVco5jtxuVFVxeiiwdDl8/poAhHTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}